Study on Simulation Technology of Coal Bed Methane Transmission Pipeline

2010 2nd International Symposium on Information Engineering and Electronic Commerce Pub Date : 2010-07-23 DOI:10.1109/IEEC.2010.5533274

Changjun Li, Xia Wu, Wenlong Jia, Enbin Liu, Kexi Liao

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Abstract

In view of the characteristics of coal bed methane, equation of state BWRS is used to calculate the thermodynamic parameters. Then based on continuity equation, momentum equation, characteristic equations of non-pipe elements and flow quantity balance equation, the simulation mathematic model of coal bed methane transmission pipeline is built. Considering the slow transient characteristic of gas flowing, the implicit central difference method is used to transform partial differential equations of the model into finite difference equations. Aiming at non-linear characteristics of differential equations, Newton iteration format is constructed and the model's solution method is discussed. Finally, MS Visual C++ is utilized to develop a simulation program of coal bed methane transmission pipeline, and the practical application is carried out. The results show the mathematic model built in the paper and its solving method are both feasible. They provide technical supports for reasonable design and operation of the coal bed methane pipelines.

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煤层气输送管道仿真技术研究

针对煤层气的特点，采用状态方程计算沸水堆的热力学参数。然后基于连续性方程、动量方程、非管元特征方程和流量平衡方程，建立了煤层气输送管道的仿真数学模型。考虑到气体流动的缓慢瞬态特性，采用隐式中心差分法将模型的偏微分方程转化为有限差分方程。针对微分方程的非线性特点，构造了牛顿迭代格式，讨论了模型的求解方法。最后利用MS Visual c++开发了煤层气输送管道的仿真程序，并进行了实际应用。结果表明，本文建立的数学模型及其求解方法都是可行的。为煤层气管道的合理设计和运行提供了技术支持。

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2010 2nd International Symposium on Information Engineering and Electronic Commerce

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